Could be a fine mess
If the ECJ rules against Safe Harbour - then a lot of US businesses will have problems. (Cloud providers and search engines especially).
The High Court in Ireland has referred a review of a complaint against Facebook to Europe's top court. The complaint alleges the social network shared EU users' data with the US National Security Agency. The European Court of Justice is to assess whether EU law needs to be updated in light of the PRISM revelations, which could …
"....a lot of US businesses will have problems...." Their problem will be moving their EU servers to a location that (a) allows them to minimise tax, and (b) allows them to avoid EU privacy laws, and (c) has good enough telecoms to allow the average Faecesbook user to quickly upload the dross they post without hitting the cancel button in frustration. Russia is one such option, and has the added benefit in that you can buy protection from Putin and his chums, making even Russian law irrelevant.
@John Savard: "Aren't all these allegations by Snowden just uncorroborated hearsay anyways?"
'The Secrets Of Room 641A' -- how it works - testimony of Mark Klein.
Oh really Mr Savard? ... How naive of you...
................."Facebook, Twitter, YouTube and web searches on Google - as well as webmail services such as Hotmail and Yahoo - are classified as "external communications", which means that they can be intercepted without the need for additional legal clearance - When someone searches for something on Google or posts on Facebook they are sending information overseas - constituting an act of external communication which could be collected under a broader warrant, - Privacy International said the interpretation of the law "patronises the British people" and showed that spy agencies operated under their own laws" - BBC News - Google and Facebook can be legally intercepted, says UK spy boss
http://www.bbc.co.uk/news/technology-27887639
................."This latest revelation shows that intelligence agencies want to see everything and identify everyone. - Their attacks on identity databases around the world shows just how right the UK was right to abandon the national ID [card]. Any national database is now a treasure trove for intelligence agencies, both domestic and foreign" BBC News - NSA 'collects facial-recognition photos from the net'
http://www.bbc.co.uk/news/technology-27663130